# Distance from Kathmandu (KTM) to Patterson (PTN)

> 13,622 km · estimated flight time 17h · Ultra-long-haul route.

## Summary

- **Distance**: 13,622 km / 8,464 mi / 7,355 nm
- **Estimated flight time**: 17h
- **Heading**: 357° (north)
- **Return heading**: 3° (north)
- **Classification**: Ultra-long-haul
- **Type**: International (Nepal) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -10.75h (When it's 02:45 in Kathmandu, it's 16:00 in Patterson)
- **Elevation difference**: 4,382 ft (PTN is lower than KTM)

## Airports

### [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)

- City: Kathmandu, Nepal
- ICAO: VNKT
- Timezone: Asia/Kathmandu
- Coordinates: 27.700000, 85.360000
- Elevation: 4,390 ft

### [Harry P Williams Memorial Airport (PTN)](https://www.flightduration.online/airport/ptn-patterson-harry-p-williams-memorial-airport/1ef266df-33d2-669c-b7cb-06bb2780ed98)

- City: Patterson, United States
- ICAO: KPTN
- Timezone: America/Chicago
- Coordinates: 29.710000, -91.340000
- Elevation: 9 ft

## Route notes

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

Time-zone information: When it's 02:45 in Kathmandu, it's 16:00 in Patterson.
With a 10.75-hour time difference, expect significant jet lag.

## Related

- [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)
- [Harry P Williams Memorial Airport (PTN)](https://www.flightduration.online/airport/ptn-patterson-harry-p-williams-memorial-airport/1ef266df-33d2-669c-b7cb-06bb2780ed98)
- [Flight duration calculator](/#calculator)